Integration of mi flora sensor

#100 mi flora beta integration
not integrated per default, so as to enable mi flora reading you must
comment ZgatewayBT_stable into config_BT.h

config_BT.h

@@ -28,7 +28,10 @@
 #define TimeBtw_Read 10000 //define the time between 2 scans
 #define HM-10 
 //#define HM-11 // uncomment this line if you use HM-11 and comment the line above
-
+#define ZgatewayBT_stable true //comment this line to test mi flora integration
+#define delimiter "4f4b2b444953413a"
+#define delimiter_length 16
+     
 /*-------------------PIN DEFINITIONS----------------------*/
 #ifdef ESP8266
   #define BT_RX 13 //D7 ESP8266 RX connect HM-10 or 11 TX